Chair-base hub.



H. W. BOLENS.

CHAIR BASE HUB.

APPLICATION FILED MAYI3.1915.

1,180,001. Patented Apt-18,1916.

13 4 mvwsa :7 74 (7/8 THE COLUMBIA PLANOGRAPH co. WASHINGTON. D. c.

UNITED STATES PATENT ourron.

HARRY W. BOLENS, 0]? PORT WASHINGTON, WISCONSIN, ASSIGNOR TO GILSON MANUFACTURING COMPANY, OF PORT WASHINGTON, WISCONSIN.

CHAIR-BASE HUB.

To all whom it may. concern Be it known that I, HARRY W. BOLENS, a citizen of the United States, and resident of Port Washington, in the county of Ozaukee and State of Visconsin, have invented certain new and useful Improvements in Chair- Base Hubs; and I do hereby declare that the following is a full, clear, and exact de scription thereof. a

My invention refers to swivel seat chair supports and has for its object to provide a simple, durable and light weight pressed steel hub for the supporting base mechanism, the said hubs constituting the journal for the usual seat-supporting spindle.

In the practical development of my novel hub I employ a cap or top plate and a bottom plate preferably composed of sheet metal, which plates are connected by a contrally disposed spindle barrel, and a series of spaced vertically disposed channel socket strips, whereby the assemblage, when properly secured preferably by spot-welding and riveting, forms a rigid, compact, light and durable skeleton hub member that can be manufactured at a considerable reduction in cost over hubs usually employed for the purpose mentionedfit being understood that a single set of dies are employed for the series of channel-strips, whereby they are interchangeable and a corresponding simple die operation is employed for manufacturing the top and bottom plates in quantities.

With the above object in view the invention consists in various details of construction and combination of mechanical elements as set forth hereinafter with reference to the accompanying drawings and subsequently claimed.

In the drawings Figure 1 represents a partly sectional elevation of a hub embodying the features of my invention, the section being indicated by line 1-1 of Fig. 2; Fig. 2, a plan view of the hub with parts broken away and other parts in section to show details of construction; Fig. 3, a side elevation of the hub, and Fig. 4, a face View of a blank from which channel strips embodying thefeatures of my present invention are formed.

Referring by characters to the drawings, 2 represents a top-plate preferably circular,

. the same being provided with a central barrel-receiving aperture and a circular depres- $1011 2 about said aperture to form a ballspecification of Letters Patent.

race; The top-plate is also provided with apertures for attaching thereto a series of channel-strips A to be more fully hereinafter described. Flushly fitted into the top-plate aperture is a spindle-barrel B, the

same being secured preferably by spot-welding. The lower end of the barrel carries a bott0m-plate 3 which is provided with a central aperture for the reception of the lower end of said barrel and this aperture,

inorder to effect a simple connection between the bottom-plate, is cut back at intervals to form ears I which are flush with the outer surface of the cylindrical barrel. Thus the bottom-plate can be adjusted upon thebarrel and secured by spot-welding or other means at any predetermined distance from the top-plate, which distance is deter- .mined by the length of the channel-strips. The bottom-plate is also apertured in a similar manner as that mentioned in connection with the upper plate for perma nently attaching the before mentioned channel strips. The channel strips A, as best shown in Fig. 4, are formed from an initially fiat blank having a backbone portion 5 which is flanked by wing portions 5. The upper end of the blank is extended from the backbone portion into a V-shaped centrally apertured head 6, while the lower end of the backbone portlon terminates with a centrally apertured foot 6 that is concaved at its end to conform to the circular surface of the barrel.

As best shown in Fig. 1, when the blanks are formed by a suitable die operation for finishing, the cap 6 is folded downwardly and outwardly at a right angle to the back bone portion and the foot 6 is folded inwardly at a corresponding angle thereto.

The wings 5 are then folded outwardly at an angle flaring from the backbone corresponding to the angular surfaces 6" of the head 6. Hence it will be seen that the head 6 forms a templet and support for the outwardly folded wing portions of the channel iron. The heads of a series of these channel-irons, as shown in the drawings, are secured to the top-plate by rivets 7, it being understood that the heads abut the bottom surface of said top-plate. The feet of the channel-irons which are bent inwardly, rest upon the inner surface of the bottom-plate 3 and are secured thereto by rivets which Patented Apr. 18, 1916.

Application filed May 13, 1915. Serial No. 27,831.

pass through the foot apertures and the apertures provided for their reception in the said bottom-plate. Hence it will be seen that a very simple and durable skeleton hub member is thus formed by a simple operation of assembling the channel members, top and bottom plates and barrel and thereafter performing the spot-welding operations, together with the riveting operations for securing the parts together. It is manifest that the series of channel-strips are spaced apart and grouped about the barrel to form leg sockets 00 between their companion wing walls, which leg sockets are contracted slightly at their mouths, as best shown in Fig. 2.

I claim:

1. A sheet metal hub of the character described comprising a tubular barrel, top and bottom plates secured to the ends of the barrel, a series of channel strips spaced apart and grouped about the barrel to form leg sockets therebetween, each channel strip comprising a backbone having a head and foot folded from its end edge respectively of the top and bottom plates, and means for securing the head and foot to their respective engaged plates.

2. A sheet metal hub of the character described comprising a tubular barrel, top and bottom plates secured to the ends of the barrel, a series of channel strips spaced apart and grouped about the barrel to form leg sockets therebetween, each channel strip comprising a backbone portion having wing portions flared outwardly therefrom, a head folded outwardly from the upper edge of the backbone, and a foot folded inwardly from the lower edge of said backbone, and

means for securing the head and foot to the top and bottom plates.

3. A sheet metal hub of the character described comprising a tubular barrel, top and bottom plates secured to the ends of the barrel, a series of channel strips spaced apart and grouped about the barrel to form leg sockets therebetween, each channel strip comprising a flat backbone portion having side wings folded outwardly therefrom to form the opposite walls of said leg sockets, a head folded outwardly and between the wings to form a closure at their upper ends, a foot constituting an extension of the backbone and folded inwardly, the head and foot being in abutting engagement with the top and bottom plate respectively, and rivets for securing said head and foot to the aforesaid plates.

4. A sheet metal hub of the character described comprising a tubular barrel, top and bottom plates secured to the ends of the barrel, a series of channel strips spaced apart and grouped about the barrel to form leg sockets therebetween, each channel-strip comprising a fiat backbone portion having outwardly divergent side wings, a V-shaped head 'folded outwardly adapted to fit between the upper edges of the flared side wings and form a flush joint therewith, a foot folded inwardly from the backbone portion of the channel strip, and means for securing the head to the top-plate and foot to the bottom plate.

In testimony that I claim the foregoing I have hereunto set my hand at Milwaukee, in the county of Milwaukee and State of Wisconsin.

HARRY W. BOLENS.

Gopies'of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. G. 

